I suggest linking the desktop drawins on the trading212 website to be linked with the app for more precise drawings.
I suggest adding locks to the layers you add so they can not be accidentaly moved when zooming in, because that is a problem that has been occurring for a while. A lock is simple and effective.
Changing colors on the parameters of the fibonacci retracement tool, and maybe other tools as well.
More colors, maybe even custom. Because these stock colors are annoying except for a few.
Hope all these features can be added with customization implemented for a more friendly userface